My Gran Turismo Diaries

A Lurid Tale of Obsession, Depravity, Wits and Attempted Wit

Wednesday October 25, 2000

(GT1 Version 1.1) GameShark Addresses and Codes for Simulation Race Parameters

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Wednesday October 25, 2000

(GT1 Version 1.1) GameShark Addresses and Codes for Simulation Race Parameters

Another table of pointers to race information begins at $8008F544 with information for the Sunday Cup 

   8008F544 - 4 bytes points to Sunday Cup track list ($80090E0C)
   8008F548 - 4 bytes points to Sunday Cup prize money ($80091004)
   8008F54C - 4 bytes points to other information ($8008F4E4)
   8008F550 - 4 bytes points to potential car list ($80090B50)
   8008F554 - 4 bytes points to prize car list ($80090D0C)
   8008F558 - 4 bytes points containing number of laps per race (2)

Each event appears to have an entry here like this. 

   8008F544 - Sunday Cup parameters
   8008F55C - Clubman Cup parameters
   8008F574 - GT Cup parameters
   8008F58C - GT World Cup parameters

   8008F5A4 - Normal Series parameters
   8008F5BC - Tuned Series parameters

   8008F5D4 - Lightweight Series parameters
   8008F5E8 - FF Series parameters
   8008F604 - FR Series parameters
   8008F61C - 4WD Series parameters

   8008F634 - HSR Spot Race parameters
   8008F64C - GVE Spot Race parameters
   8008F664 - Autumn Mini Spot Race parameters
   8008F67C - Trial Mountain Spot Race parameters
   8008F694 - DFRW Spot Race parameters

   8008F6AC - Mega-Speed Series parameters

   8008F6C4 - USvsJP(?) parameters
   8008F6DC - UKvsJP(?) parameters
   8008F6F4 - UKvsUS(?) parameters

   8008F70C - GV300 Race parameters
   8008F724 - SSR11 I Race parameters
   8008F73C - SSR11 II Race parameters

Yet another list of car file names appears at 800C17C2. 

    800D7010 to about
    800D7268  and maybe beyond

appears to be car file names followed by expansions of those into sort of pseudo-garage entries.

At $800FED16 external car name strings appear to start.

Here are some of the prize list values: 

    80090D0C -> 8008C678 "a-emn" (Demio, Sunday Cup)
    80090D14 -> 8008C680 "c-30n" (Camaro 30th, Clubman Cup)
    80090D1C -> 8008C688 "t-hvr" (Chaser LM, GT Cup)

So, we can construct a code to win the B, A and IA license test cars for winning the Sunday, Clubman and GT Cup respectively: 

    D0090D0C  C678
    80090D0C  BD10
    D0090D14  C680
    80090D14  BD08
    D0090D1C  C688
    80090D1C  BD00

What we do here is change the pointers to the prize car filename strings to point to areas containing the license test prize cars. (Note I suspect the prize car strings may need to be word-aligned, and perhaps even on 4 or 8-byte boundaries, since the 5-byte strings used are aligned on 8 byte boundaries).

So far in most of my GameShark Pro experiments I patched the actual characters in the strings. Perhaps I should experiment with changing them to point to non-aligned strings and see if the game locks up. 8-(

Now, the Grand Valley 300 entry list contains a lot of neat prize-cars and special models.

So I tracked that down. 

    8008F70C - GV300 Race parameters

    entry list -> 80090BFC
At 80090BFC I found: 
    8008C528 "nr32r" ([R] R32'91 Skyline)
    8008C500 "mgntr" ([R] GTO twinturbo)
    8008C5C8 "hnslr" (NSX-R LM GT2 Special Model)
    8008C5D0 "tsplr" (white Castrol Supra GT Special Model)
    8008C530 "sixpr" (Impreza Rally Edition)
    8008C5C0 "nl33r" (GT-R LM Special Model)
    8008C5D8 "tcegr" ([R] Celica GT-4)
    8008C4F0 "mlnnr" ([R] Lancer EvoIV GSR)
    8008C5B8 "npror" ([R] Primera'90 2.0te)
    8008C5A8 "texvr" ([R] EXIV 200GT)
    8008C5B0 "hacsr" ([R] Accord Sedan)
    8008C5A0 "altsr" ([R] Lantis TypeR)

Now, the [R] mod cars don't work as prizes, but the Special Models work very well. If you arrange to win one of these, you can sell it for Cr300,000!

The other two Special Models can be found at: 

    800C1852 "afn7r" (RX-7 LM Edition)
    800C1B58 "mgtlr" (GTO LM Edition)

These will require more instructions to set as prizes, because the top two bytes need changing as well.

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